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United States Patent | 6,233,066 |
Kojima ,   et al. | May 15, 2001 |
In an image processing apparatus and an image reading apparatus in accordance with the present invention, a density difference detection circuit 9 detects the density differences between input image data 400 and storage data 64 stored in an image memory 6 at an overlapping scanning area read by overlap scanning, a density correction circuit 9 corrects the gray levels of the input image data 400 on the basis of the detected density differences, and a mapping circuit 5 stores correction data 910 in the image memory 6.
Inventors: | Kojima; Akio (Neyagawa, JP); Kuwahara; Yasuhiro (Osaka, JP); Kataoka; Masao (Moriguchi, JP); Naka; Teruyuki (Izumi, JP); Sogami; Atsushi (Sanda, JP); Koga; Toshiaki (Hirakata, JP) |
Assignee: | Matsushita Electric Industrial Co., Ltd. (Osaka-Fu, JP) |
Appl. No.: | 123185 |
Filed: | July 27, 1998 |
Aug 06, 1997[JP] | 9-225869 |
Current U.S. Class: | 358/488; 358/404 |
Intern'l Class: | H04N 001/04 |
Field of Search: | 358/404,488,462 382/169 |
5720021 | Feb., 1998 | Murata et al. | 395/138. |
5949921 | Sep., 1999 | Kojima et al. | 382/295. |
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